Does it matter? A discussion is not about signalling that you support the correct side even though social media seems to think so.

Pyre is an interesting sports game IMO because it doesn’t try to look like any real sport.

You don’t need to cite, you need to provide source code. The point of GPL is to allow the user to inspect and modify the software. You can even sell it as long as you provide the modified source code under the same license.